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Finding the Fourth Proportional to 66,880,171.80, 100,320,257.70 and 56,676,504.60

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Solution

The fourth proportional to 66,880,171.80, 100,320,257.70 and 56,676,504.60 is: 85,014,756.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,880,171.80 : 100,320,257.70 = 56,676,504.60 : x
  2. Step 2: Convert to fraction form
    66,880,171.80/100,320,257.70 = 56,676,504.60/x
  3. Step 3: Cross multiply
    66,880,171.80x = 100,320,257.70 × 56,676,504.60
  4. Step 4: Simplify right side
    66,880,171.80x = 5,685,801,547,007,236
  5. Step 5: Solve for x
    x = 5,685,801,547,007,236/66,880,171.80
  6. Step 6: Final answer
    x = 85,014,756.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.